stranded double insulated electrical cable aluminum steel wire

1. Low-voltage cable: suitable for fixed laying on power transmission and distribution lines with AC 50Hz and rated voltage 3kv and below for power transmission. 2. Medium and low voltage cables: (generally 35KV and below): PVC insulated cables, polyethylene insulated cables, XLPE insulated cables, etc. 3. High-voltage cables: (generally 110KV and above): polyethylene cables and XLPE insulated cables. 4. Extra-high voltage cable: (275 to 800 kV). 5. UHV cables: (1000 kV and above).

1. direct burial cable, generally use armored cable, direct embedment depth of not less than 0.7m 2. The net distance for the installation of cables of 10kV and below should be ≥0.1M, the net distance for the installation of cables of 10kV and above should be ≥0.25m, and the net distance between cross-installation of cables should be ≥0.5m 3. When the cable is close to the thermal pipeline (including oil pipeline), the electrical clearance should be not less than 2m; when crossing, the electrical clearance should be not less than 0.5m; 4. When the cable is directly buried, there must be a good soil layer at the bottom of the cable trough without stones or other hard debris. Otherwise, a 100mm thick layer of soft soil or sand should be laid. After laying the cable, it should be covered with a 100mm thick layer of soft soil or sand, and then covered with a concrete protection board. The width of the cable on both sides of the diameter should exceed 50mm. 5. When the cable leads from the ground or cable trench to the ground, the part 2m above the ground shall be protected by a metal pipe or cover, and its root shall be 0.1M underground. 6. When installing a cable with an external shield, the semi-conductive shield must be removed from the terminals and the insulation must not be damaged during operation. The copper strip and steel strip at the end of the cable must be well grounded. The grounding lead-out wire should be a tin-plated textile copper wire. When connecting to the cable copper strip, chrome iron tin soldering should be used. 7. The crane must be loaded or unloaded with a crane or forklift. Do not carry or lay cables horizontally. The installation of large cables must use cable laying equipment. 8. The end of the cable should be sealed to prevent erosion by water and other corrosive materials.